Batch Utility to delete Report Definitions in Deliver.
Deliver program RMOUTIL or RMODBB can be used to delete Report Definitions in Deliver.
In RMOUTIL a series of "/DELETE RID=..." transactions can be used.
In RMODBB, the delete is done via a previously-formatted transaction, usually via RMOGRW.
If the reports are in a View database, it is even possible to use program SARGRW, to generate the transactions.